The crystal structures of para-chloriodoxy benzene and some other aromatic compounds

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dc.contributor.advisorJames, R Wen_ZA
dc.contributor.authorArcher, Elizabeth Murielen_ZA
dc.date.accessioned2016-10-21T07:39:19Z
dc.date.available2016-10-21T07:39:19Z
dc.date.issued1947en_ZA
dc.description.abstractThe crystal structures of meta-dinitrobenzene, para-chloriodoxy benzene, and benzene iodo-dichloride are described. The structure of meta-dinitrobenzene, C₆H₄(NO₂)₂), was obtained from Fourier projections on the ab and bc planes. The x and y coordinates were obtained with considerable accuracy from the projection on the ab plane, and the z coordinates were obtained from a previous knowledge of the size and shape of the nitro groups and the agreement between the observed and calculated values of F(Okl). The method of three-dimensional Fourier sections was applied to the crystal para-chlor-iodoxy benzene, (ClC₆H₄IO₂), and the coordinates of all the atoms were obtained without any ambiguity. The I-O distances in the iodoxy group are short, which implies the existence of double bonding between the I and O atoms. The main binding forces in the crystal are found to be between neighbouring iodoxy groups. The structure of benzene iodo-dichloride, (C₆H₅ICl₂), has been obtained from Fourier projections on the ac and bc planes. The iodo-dichloride· group is linear. The directions of the covalent bonds of trivalent iodine in C₆H₅ICl₂ can be placed in a trigonal bipyramid, but it was impossible to fit the covalent bonds of pentavalent iodine in ClC₆H₄IO₂ into any simple geometrical figure. These iodine compounds were done in order to determine the valency directions of polyvalent iodine, and to see if there was any relationship between the directions of the covalent bonds in trivalent and pentavalent iodine. If such a relationship does exist, it has not yet been detected.en_ZA
dc.identifier.apacitationArcher, E. M. (1947). <i>The crystal structures of para-chloriodoxy benzene and some other aromatic compounds</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/22253en_ZA
dc.identifier.chicagocitationArcher, Elizabeth Muriel. <i>"The crystal structures of para-chloriodoxy benzene and some other aromatic compounds."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1947. http://hdl.handle.net/11427/22253en_ZA
dc.identifier.citationArcher, E. 1947. The crystal structures of para-chloriodoxy benzene and some other aromatic compounds. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Archer, Elizabeth Muriel AB - The crystal structures of meta-dinitrobenzene, para-chloriodoxy benzene, and benzene iodo-dichloride are described. The structure of meta-dinitrobenzene, C₆H₄(NO₂)₂), was obtained from Fourier projections on the ab and bc planes. The x and y coordinates were obtained with considerable accuracy from the projection on the ab plane, and the z coordinates were obtained from a previous knowledge of the size and shape of the nitro groups and the agreement between the observed and calculated values of F(Okl). The method of three-dimensional Fourier sections was applied to the crystal para-chlor-iodoxy benzene, (ClC₆H₄IO₂), and the coordinates of all the atoms were obtained without any ambiguity. The I-O distances in the iodoxy group are short, which implies the existence of double bonding between the I and O atoms. The main binding forces in the crystal are found to be between neighbouring iodoxy groups. The structure of benzene iodo-dichloride, (C₆H₅ICl₂), has been obtained from Fourier projections on the ac and bc planes. The iodo-dichloride· group is linear. The directions of the covalent bonds of trivalent iodine in C₆H₅ICl₂ can be placed in a trigonal bipyramid, but it was impossible to fit the covalent bonds of pentavalent iodine in ClC₆H₄IO₂ into any simple geometrical figure. These iodine compounds were done in order to determine the valency directions of polyvalent iodine, and to see if there was any relationship between the directions of the covalent bonds in trivalent and pentavalent iodine. If such a relationship does exist, it has not yet been detected. DA - 1947 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1947 T1 - The crystal structures of para-chloriodoxy benzene and some other aromatic compounds TI - The crystal structures of para-chloriodoxy benzene and some other aromatic compounds UR - http://hdl.handle.net/11427/22253 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22253
dc.identifier.vancouvercitationArcher EM. The crystal structures of para-chloriodoxy benzene and some other aromatic compounds. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1947 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22253en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleThe crystal structures of para-chloriodoxy benzene and some other aromatic compoundsen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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